I went on vacation for four days and i just got back. I went to check on Nemo and turned on the aquarium light. He started to do laps around the bottom of my tank and would only turn when his hiead hit the corner of the glass. He has since ran into and few rocks and hermit crabs on the bottom. I threw in some food and he only eats if he runs into it. Did i turn on the tank light and blind him? Will he come around?